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(11)

EP 3 646 536 A1

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(43) Date of publication: 06.05.2020 Bulletin 2020/19 (21) Application number: 18765212.8 (22) Date of filing: 18.07.2018

(51) International Patent Classification (IPC):  H04L 12/40(2006.01) H04L 29/06(2006.01) (86) International application number: PCT/SG2018/050355 (87) International publication number: WO 2019/017844 (24.01.2019 Gazette 2019/04)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 20.07.2017 SG 10201705960Q (71) Applicant: Huawei International Pte. Ltd. Singapore 486066 (SG)	(72) Inventors: YANG, Yanjiang Singapore 117674 (SG) WEI, Zhuo Singapore 117674 (SG) LIN, Hsiao-Ying Singapore 117674 (SG) SHA, Qingdi Shenzhen Guangdong 518129 (CN) (74) Representative: Epping - Hermann - Fischer  Patentanwaltsgesellschaft mbH Schloßschmidstraße 5 80639 München 80639 München (DE)